11505945 has 32 divisors (see below), whose sum is σ = 20269440. Its totient is φ = 5527040.

The previous prime is 11505943. The next prime is 11505947. The reversal of 11505945 is 54950511.

11505945 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11505943) and next prime (11505947).

It is not a de Polignac number, because 11505945 - 2¹ = 11505943 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11505943) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22351 + ... + 22859.

It is an arithmetic number, because the mean of its divisors is an integer number (633420).

Almost surely, 2^11505945 is an apocalyptic number.

11505945 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

11505945 is a deficient number, since it is larger than the sum of its proper divisors (8763495).

11505945 is a wasteful number, since it uses less digits than its factorization.

11505945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 11505945 is about 3392.0414207377. The cubic root of 11505945 is about 225.7567605152.

The spelling of 11505945 in words is "eleven million, five hundred five thousand, nine hundred forty-five".